The ACI A/DLP-040-W-U-D-A-0 is a differential low pressure transmitter built around a piezoresistive silicon sensing element, with up to 8 DIP-switch-selectable pressure ranges (0-10 to 0-40 in WC) configurable as either unidirectional or bidirectional. Field-selectable analog outputs include 4-20 mA, 0-5 VDC, and 0-10 VDC, all on the same unit. +/-0.5% FSO typical accuracy (including hysteresis, linearity, and repeatability at 71 F), front-cover pushbutton zero for in-place re-zeroing, and a flame-retardant polycarbonate enclosure with watertight cordgrip and hinged cover. This SKU includes the 5-digit LCD display for on-board pressure readout during commissioning, balancing, and troubleshooting - no handheld meter needed to verify what the transmitter is sensing.
WARRANTY
Key Features
8-Range, 3-Output DIP Configuration
Each unit supports up to 8 field-selectable pressure ranges via the SW3 DIP switch (0-10 to 0-40 in WC both unidirectional and bidirectional), plus 3 selectable output signals (4-20 mA, 0-5 VDC, 0-10 VDC) via SW1 and SW3. One part number covers many job requirements.
Piezoresistive Silicon Sensing
Solid-state silicon element with +/-0.5% FSO typical accuracy (hysteresis, linearity, and repeatability at 71 F included). Thermal effects are +/-0.067% FSO/F (0.12% FSO/C). Low warm-up drift, low long-term drift, stable across the 32-122 F compensated range.
On-Board 5-Digit LCD Display
Built-in LCD shows live differential pressure in either inches WC or pascals (DIP-selectable). Also displays AUTOZERO icon during zero-mode operation and OUT OF RANGE indicator when the sensed pressure exceeds the selected range - useful for commissioning and field troubleshooting.
Flexible Mounting Options
Direct panel-screw mount via two top/bottom flange holes (two #8 x 3/4 in self-drilling screws included), or add the optional A/DRC-DLP 35 mm DIN rail clip. The A/PT-DLP duct-static pitot tube can be added later for in-duct airflow measurement.
Rugged Watertight Enclosure
Flame-retardant polycarbonate housing with UL94-5VA rating (more stringent than V-0). Watertight cordgrip pre-installed for the field wiring entry; the cordgrip can be removed to accept 1/2 in NPT conduit fittings instead. Hinged cover with integrated locking tab opens easily without tools.
Robust Overpressure Protection
Proof pressure: 562 in WC (140 kPa). Burst pressure: 1004.7 in WC (250 kPa). The piezoresistive sensor tolerates significant overpressure events well above the maximum 40 in WC sensing range - protects against duct surge, fan startup transients, and accidental high-pressure mis-plumbing.
Selectable Range Options
This SKU offers 8 field-selectable ranges set via the internal DIP switch. Power must be off when changing the configuration:
| Range Type | Available Settings |
|---|---|
| Unidirectional ranges (4) | 0-10 in WC, 0-20 in WC, 0-30 in WC, 0-40 in WC |
| Bidirectional ranges (4) | +/-10 in WC, +/-20 in WC, +/-30 in WC, +/-40 in WC |
| Default (factory shipped) | 0-40 in WC (largest unidirectional) |
| Range selection method | DIP switch SW3 positions 1 and 2 (with position 5 = UNI or BI) |
Technical Specifications
| Specification | Value |
|---|---|
| Model | A/DLP-040-W-U-D-A-0 |
| Maximum Pressure (Sensor) | 40 in WC |
| Selectable Ranges (Unidirectional) | 0-10 in WC, 0-20 in WC, 0-30 in WC, 0-40 in WC |
| Selectable Ranges (Bidirectional) | +/-10 in WC, +/-20 in WC, +/-30 in WC, +/-40 in WC |
| Direction Mode | Unidirectional or Bidirectional, field-selectable via DIP switch SW3 position 5 |
| Accuracy | +/-0.5% FSO typical (includes hysteresis, linearity, repeatability at 71 F) |
| Output Signals | Field-selectable: 4-20 mA (2-wire loop), 0-5 VDC (3-wire), or 0-10 VDC (3-wire) |
| Supply Voltage | 4-20 mA: 16-36 VDC (250 ohm load) or 22-36 VDC (500 ohm load) / 24 VAC +/-10%, 50/60 Hz; 0-5 VDC and 0-10 VDC: 15-36 VDC into >5K ohm load / 24 VAC +/-10%, 50/60 Hz |
| Supply Current | 4-20 mA: 24 mA minimum (0.83 VA); 0-5/0-10 VDC: 6 mA maximum (0.18 VA) |
| Output Limit | 4-20 mA: 21.5 mA max; 0-5 VDC: 5.25 V max; 0-10 VDC: 10.5 V max |
| Sensor Type | Piezoresistive silicon |
| Compensated Temperature Range | 32 to 122 F (0 to 50 C) |
| Thermal Effects | +/-0.067% FSO/F (0.12% FSO/C), referenced to 71 F |
| Response Time (0-100% FSO) | 4 seconds |
| Output Update Rate | 0.5 second intervals |
| Zero Function | Front-panel SW2 pushbutton (3+ second press-and-hold) |
| Proof Pressure | 562 in WC (140 kPa) |
| Burst Pressure | 1004.7 in WC (250 kPa) |
| Operating Temperature | -4 to 185 F (-20 to 85 C) |
| Operating Humidity | 10 to 95% RH, non-condensing |
| Storage Temperature | -22 to 185 F (-30 to 85 C) |
| Media | Dry air or inert non-conductive gases |
| Display | 5-digit LCD display |
| Pressure Fitting Material | Nickel-plated brass or stainless steel |
| Tubing Size Accepted | 1/4 in OD x 0.170 in ID poly tubing |
| Wiring Connections | 3-position finger-pushbutton (spring) terminal blocks, accepts 16-24 AWG wires |
| Conduit Entry | Watertight cordgrip installed (1/2 in NPT conduit accepted when cordgrip is removed) |
| Enclosure Material | Flame-retardant polycarbonate, UL94-5VA flammability rating |
| Dimensions (L x W x D) | 5.56 x 4.35 x 2.25 in (141.29 x 110.43 x 57.24 mm) |
| Weight | 0.58 lb (0.263 kg) |
| Included Accessories | None (transmitter only) |
| Approvals | CE, REACH, RoHS2, WEEE |
| Country of Origin | Made in USA - Middleton, Wisconsin |
| Warranty | 5-year limited |
| Manufacturer Part Number | A/DLP-040-W-U-D-A-0 |
Documentation
Frequently Asked Questions
What pressure ranges does the A/DLP-040-W-U-D-A-0 support?
How do I change the pressure range or output signal?
How and when should I zero the transmitter?
What does the LCD display show?
How do I install the pitot tube and DIN rail clip?
How do I wire the transmitter?
- Series:
- DLP
- Pressure Range Class:
- Medium (10 to 50 in WC)
- Pressure Range:
- 40 in WC
- Direction:
- Unspecified
- Output Signal:
- 4-20 mA + Voltage
- Display:
- LCD
- Accuracy Class:
- High (0.5% FS or better)
- Mounting:
- DIN Rail / Panel
- Probe:
- No Probe
- Made in USA:
- Yes
